// Copyright (C) INFINI Labs & INFINI LIMITED.
//
// The INFINI Framework is offered under the GNU Affero General Public License v3.0
// and as commercial software.
//
// For commercial licensing, contact us at:
//   - Website: infinilabs.com
//   - Email: hello@infini.ltd
//
// Open Source licensed under AGPL V3:
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

package impl

import (
	f "github.com/seiflotfy/cuckoofilter"
	"sync"
)

type CuckooFilterImpl struct {
	l  sync.Mutex
	cf *f.CuckooFilter
}

func (filter *CuckooFilterImpl) Open() error {

	filter.cf = f.NewCuckooFilter(10000000)
	return nil
}

func (filter *CuckooFilterImpl) Close() error {
	filter.l.Lock()
	defer filter.l.Unlock()
	return nil
}

func (filter *CuckooFilterImpl) Exists(key []byte) bool {
	filter.l.Lock()
	defer filter.l.Unlock()
	return filter.cf.Lookup(key)
}

func (filter *CuckooFilterImpl) Add(key []byte) error {
	filter.l.Lock()
	defer filter.l.Unlock()
	filter.cf.Insert(key)
	return nil
}

func (filter *CuckooFilterImpl) Delete(key []byte) error {
	filter.l.Lock()
	defer filter.l.Unlock()
	filter.cf.Delete(key)
	return nil
}
